QR Code :: Mobile Bookmark

What is this? This is a QR Code: a machine-readable image-based code consisting of black and white squares. QR Codes are typically used for storing URLs and other information for reading by a smart devices like smart phones.
When scanned by an appropriate app on your mobile device, you are redirected to the embedded URL of this page. View this page with one device (desktop or another mobile device), and then scan the
QR Code with your mobile device. This makes it quicker and easier to browse a page discovered on one device on your mobile device without manually entering the URL in the mobile device browser address bar.

⚬ If you are using an Android phone, you can find a QR Code reading app at Google Play on your device.

⚬ If you are using an iOS device (iPhone, iPad, etc.), you can find a QR Code reading app at the Apple iTunes App Store on your device.

⚬ If you are using a Windows phone, you can find a QR Code reading app at the Microsoft Store on your device.

Each index is given a unique name when it is created. This is often generated
by the driver based on the index key(s) and order/type, but custom names may
also be specified with MongoCollection::createIndex()'s
"name" option).

Unfortunately, MongoCollection::deleteIndex() cannot
delete custom-named indexes due to a backwards compatibility issue. When a
string argument is provided, it is assumed to be the single field name in an
ascending index (e.g. the name "x_1" would be used for the
argument "x"). If an array or object is provided, an index
name is generated just as if that argument was passed to
MongoCollection::createIndex().

In order to delete a custom-named index with the PHP driver, the
deleteIndexes database command must be used. For instance,
an index named "myIndex" could be deleted with the PHP driver by running:

To determine the name of an index with the PHP driver, you can query the
system.indexes collection of a database and look for the
"name" field of each result. The "ns"
field will indicate the collection to which each index belongs.

Parameters

keys

An array specifying the index's fields as its keys. For each field, the
value is either the index direction or
» index type.
If specifying direction, specify 1 for ascending or
-1 for descending.

If a string is provided, it is assumed to be the single field name in an
ascending index.